

.main {
    width: 500px;
    height: 400px;
    background: rgba(0, 0, 0, .5);
    position: absolute;
    top: 50%;
    transform: translate(-50%,-50%);
    left: 50%;
    border-radius: 10px;
    transition: all .3s;
    cursor: pointer;
    padding: 10px;
    box-sizing: border-box;
}
.main:hover{
  transform: translate(-50%,-49%);
}
.main h1 {
    color: #fff;
    font-size:34px;
    text-align: center;
}

.main h3 {
    margin: 10px 0;
    font-size: 26px;
    color: #eee;
}

.jj {
    text-align: left;
    font-size: 23px;
    text-indent: 2em;
    line-height: 1.4;
    color: #ccc;
}

.nav{
    margin-top: 20px;
    padding: 0 10px;
    box-sizing: border-box;
}
.nav span a{
    font-size: 20px;
}
.nav .toP{
    float: left;
}
.nav .toMe{
    float: right;
}
@media screen and (max-width: 720px)  {
    .main{
        width: 98vh;
    }
    .container{
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .aduiobox{
        display: none;
    }
}